77527139 has 2 divisors, whose sum is σ = 77527140. Its totient is φ = 77527138.

The previous prime is 77527133. The next prime is 77527141. The reversal of 77527139 is 93172577.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77527139 - 2¹⁶ = 77461603 is a prime.

Together with 77527141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 77527096 and 77527105.

It is not a weakly prime, because it can be changed into another prime (77527133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38763569 + 38763570.

It is an arithmetic number, because the mean of its divisors is an integer number (38763570).

Almost surely, 2^77527139 is an apocalyptic number.

77527139 is a deficient number, since it is larger than the sum of its proper divisors (1).

77527139 is an equidigital number, since it uses as much as digits as its factorization.

77527139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92610, while the sum is 41.

The square root of 77527139 is about 8804.9496875337. The cubic root of 77527139 is about 426.4007099729.

The spelling of 77527139 in words is "seventy-seven million, five hundred twenty-seven thousand, one hundred thirty-nine".